Ok, I think I found a way of using Dialogs as MDI childs. I will create a standard win32 window using CreateWindow and then attach a borderless dialog on that window. However, I got everything ready to create an MDI child, and now it is now working. I have been looking what I did wrong for about 40 minutes so far and it all seems right. I have uploaded the entire workspace to my site, here is the link: http://home.wanadoo.nl/vdwillik/downloads/mdi.rar Any help is appreciated. Sand Hawk

*bump*